personality

to see if temprament is innate

they studied 133 children and later interviewed the parents on reaction to change

they found that the children could fit into two groups these were: easy, difficult and slow to warm.

they found that temprament is innate

to see if temprament is innate

they studied 228 pairs of monozygotic and 174 pairs of dizygotic twins. they tested the twins on emotionality,reactivity & sociability.

they found that the monozygotic twins had a closer correlation in results than the dizygotic twins.

they concluded that tempeament is innate

wanted to see if temprament is due to biological differences

they studied four month old babies in new situations. care giver was placed in babies sight holding a toy and playing with it. then the caregiver hid from the childs line of sight and researcher played with the baby.

20% were high reactives

40% were low reactive

40% were somewhere between the two.

11 years later they met thechildren and the people that were high reactives were shy and the low reactives were not.

wanted to test the personality of 700 servicemen. he made them fill out a questionnaire and he used factor analsyis to analyse the results.

he found that there were 2 dimentions to personality and these were stablilty-neuroticm,introverted-extroverted.

everyone fits into the scale some people lay between the two.

to test the theory that APD is cause by abnormalities in the brain.

he studied 34 healthy men and 21 men with APD using an mri scan

he found that the men with APD had a 11% reduction in the grey matter of the prefrontal cortex of the brain.

APD is caused by abnormalities in the brain.

to test the development of APD in males from childhood to 50

he carried out a longitudinal study of APD in 411 males. they lived in a deprived inner city london estate. the parents and teachers were interviewed.

the most important risk factors for offending were low school achievement, poverty and poor arenting.

situational factors lead to the development of APD

to investigate the childhood risk factors that can predict APD in adulthood

225 twis who were diagonosed with childhood disorders were interviewed 10-25 years later.

he found that childhood hyperactivity, conduct disorders ,low iq and reading problems are predictors of APD

disruptive behaviour in childhood can be used to predict APD in adulthood